Home / 631,985.70-872,143.34-345,505.78

Finding the Fourth Proportional to 631,985.70, 872,143.34 and 345,505.78

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Solution

The fourth proportional to 631,985.70, 872,143.34 and 345,505.78 is: 476,799.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,985.70 : 872,143.34 = 345,505.78 : x
  2. Step 2: Convert to fraction form
    631,985.70/872,143.34 = 345,505.78/x
  3. Step 3: Cross multiply
    631,985.70x = 872,143.34 × 345,505.78
  4. Step 4: Simplify right side
    631,985.70x = 301,330,564,958.51
  5. Step 5: Solve for x
    x = 301,330,564,958.51/631,985.70
  6. Step 6: Final answer
    x = 476,799.66

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.